> Isn't this exactly what they do? That what the Nest does when there's going to be a spike; it cools the house.

I don't have any experience with Nest, but the Ecobee seemed to just increase the cool set temp when there was demand. I didn't experience any proactive cooling.

Interestingly, in the Ecobee Community Energy Savings FAQ I linked above it says:

> [...] your thermostat may precool your home prior to the event to make sure you’re comfortable.

But I never experienced this. I wonder if its energy provider dependent.